WO2010044748A1 - Désinfection de coffrets de radiographies avec des rayons ultraviolets c - Google Patents

Désinfection de coffrets de radiographies avec des rayons ultraviolets c Download PDF

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Publication number
WO2010044748A1
WO2010044748A1 PCT/SG2008/000402 SG2008000402W WO2010044748A1 WO 2010044748 A1 WO2010044748 A1 WO 2010044748A1 SG 2008000402 W SG2008000402 W SG 2008000402W WO 2010044748 A1 WO2010044748 A1 WO 2010044748A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor
uvc
disinfection
cassette
compartment
Prior art date
Application number
PCT/SG2008/000402
Other languages
English (en)
Inventor
Ramulu Vijaya Kumar
Yeow Hong Chin
Original Assignee
Nanyang Polytechnic
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanyang Polytechnic filed Critical Nanyang Polytechnic
Priority to PCT/SG2008/000402 priority Critical patent/WO2010044748A1/fr
Publication of WO2010044748A1 publication Critical patent/WO2010044748A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/10—Ultraviolet radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/20—Targets to be treated
    • A61L2202/23—Containers, e.g. vials, bottles, syringes, mail
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/20—Targets to be treated
    • A61L2202/24—Medical instruments, e.g. endoscopes, catheters, sharps

Definitions

  • the present invention relates to ultra-violet light disinfection of X-ray cassettes.
  • An X-ray cassette is used many times within its life span. Before use, a cassette is disinfected by manually wiping with a paper towel or gauze that is wetted with 70% isopropyl alcohol or Johnson & JohnsonTM presept. This method is time consuming and predisposes a handler to infection. For example, in hospital settings, the rate of picking up bacterial infection, such as methicillin-resistant staphylococcus aureus (MRSA) infection, ranges from about one to four per 2000 patient-days.
  • MRSA methicillin-resistant staphylococcus aureus
  • UV light has been used to disinfect water and air.
  • UVC C- bandwidth
  • US patent publication no. 2006/0204398 describes a process for reducing transmission of infection between patients by x-ray cassettes.
  • the exposed surfaces of a cassette are disinfected, for example, by spraying disinfectant and allowing the surfaces to dry; covering the disinfected cassette with a fluid repelling and radio translucent wrap; and using the disinfected cassette with the wrap or re- disinfecting a used cassette with the wrap, or repeating the entire disinfection and wrap covering process.
  • the present invention provides a UVC light disinfection device for various types and sizes of x-ray cassettes with minimal human handling.
  • the device exposes x- ray cassettes for a predetermined time and intensity of UVC light to render replication of bacteria, viruses and moulds ineffective.
  • the present invention describes an x-ray cassette disinfection system.
  • the system comprises: a disinfection compartment having two spaced apart side panels; a closed top panel; an end panel with an entrance and an opposite end panel with an exit; a conveyor operable in the disinfection compartment for moving an x-ray cassette from the entrance to the exit of the disinfection compartment; and an elongate UVC lamp mountable on each side panels with their longitudinal axes substantially parallel to the conveyor so that UVC light emitted from two UVC lamps are incident for an aggregate exposure of a predetermined time on all exterior surfaces of each x-ray cassette at an intensity of about 25 mW/cm 2 or more.
  • the panels of the system is made of black acrylic, which is UV-resistant.
  • the entrance or exit of the disinfection compartment comprises a curtain or a swing door.
  • the system comprises two rows of guide rods suspended from the top panel to contact sides of each x-ray cassette to guide its travel on the conveyor.
  • the conveyor comprises a plurality of sections.
  • a section of the conveyor may comprise a belt and a driven pulley or may comprise a driven roller and a number of free-wheeling rollers.
  • the driven pulleys or rollers of adjacent sections may be connected by separate transfer belts.
  • the system comprises an elongate UVC lamp disposed below the conveyor.
  • a reflector may be used to reflect downward UVC light rays up through gaps between the roller conveyor to disinfect the x-ray cassettes.
  • FIG. IA illustrates an x-ray cassette disinfection system according to an embodiment of the present invention.
  • FIG. IB illustrates an x-ray cassette disinfection system according to another embodiment of the present invention.
  • FIGs. 2A and 2B illustrate schematic electrical connections of the motor, fan and UVC lamps shown in FIG. IA or IB;
  • FIG. 3 shows an x-ray image of a cassette after exposure to UVC light
  • FIG. 4 shows an x-ray image of a specimen before a cassette is exposed to UVC light
  • FIG. 5 shows an x-ray image of the specimen used in FIG. 3 after a cassette is exposed to UVC light.
  • Low pressure mercury vapour lamps emit about 85% of their light at about 254 nm, which is in the UVC band and is effective in disabling bacteria, viruses and moulds from replicating.
  • the present invention provides a UVC light disinfection device for various types and sizes of x-ray cassettes with minimal human handling. The device exposes x-ray cassettes for a predetermined duration and predetermined intensity of UVC light to render replication of bacteria, viruses and moulds ineffective.
  • FIG. IA shows a system 10 for disinfecting x-ray cassettes 11 according to an embodiment of the present invention.
  • the system 10 includes a conveyor 20 and a disinfection compartment 30.
  • An input end of the conveyor 20 defines a cassette input section 12 whilst the opposite end defines a cassette output section 14, with the disinfection compartment 30 located between the cassette input and output sections 12, 14.
  • the conveyor 20 is made up of a plurality of sections, each section is made up of a belt 24, a driven roller 22a and some free-wheeling rollers 22b.
  • the conveyor 20 is driven by a motor 26 through a drive pulley 23 and drive belt 25.
  • Another drive belt 25 is connected to a driven rollers 22a of an adjacent section of the conveyor 20.
  • the free-wheeling rollers 22b at the ends of adjacent sections of the conveyor 20 are linked by a separate transfer belt 25a.
  • the motor 26 is an electric motor and is located in a service compartment 16, which is below the conveyor 20. All the rollers 22a,22b, belts 24,25,25a and pulleys are made of UV resistant thermoplastics.
  • the length of each section of the conveyor is less than 24 cm.
  • the motor 26, drive pulley 23 and rollers 22a,22b are selected so that the linear conveying speed of the conveyor 20 is about 70 cm/min and gives a cassette 11 a travel time of about one minute in the disinfection compartment 30.
  • the disinfection compartment 30 is defined by two spaced apart side panels 32, a closed top panel 34, an entry panel 36 and an exit panel 38. Suspended from the top panel 34 are two rows of vertical guides 40. The vertical guides 40 are located so that lower ends 40a of the guides 40 contact the top side edges of each x-ray cassette 11 such that the vertical guides 40 guide travel of an x-ray cassette 11 through the disinfection compartment 30.
  • an elongate UVC lamp 50 mounted on an interior face of one side panel 32 such that a longitudinal axis of the elongate UVC lamp 50 is substantially parallel to the direction of travel of the x-ray cassette 11 on the conveyor 20 and UVC light from the lamp irradiates both top and near side of the x-ray cassette 11.
  • another elongate UVC lamp 50 is mounted parallel to the conveyor 20 so that UVC light from the another elongate UVC lamp 50 irradiates both top and far side of the x-ray cassette 11.
  • Each UVC lamp 50 is a low-pressure mercury lamp with external dimensions of a typical fluorescent lamp except that the tube is made of fused quartz and is not internally coated with phosphor.
  • Each UVC lamp 50 has an input power of 25 W and gives an output intensity of about 25mW/cm 2 at a radial distance of about 20 mm.
  • Ballasts 52 required to regulate current to the UVC lamps 50 are located in the service compartment 16.
  • a starter 54 for starting illumination of each UVC lamp 50 is connected across the ends of each UVC lamp 50.
  • an elongate UVC lamp 50a which is the similar to the above UVC lamp 50, is mounted on the near side panel 32 between the UVC lamp 50 and the conveyor 20 and another elongate UVC lamp 50a on the opposite side panel 32 at the same elevation as that on the near side panel 32.
  • These elongate UVC lamp 50a are also mounted substantially parallel to the UVC lamp 50 or conveyor 20 such that the UVC light is incident on respective side faces and end faces of an x-ray cassette 11.
  • the entry panel 36 has an entry aperture 36a whilst the exit panel 38 has an exit aperture 38 a.
  • Each entry aperture 36a and exit aperture 38a is covered by a curtain 37.
  • the curtain 37 is flexible and is cut into strips to make it more flexible so as to reduce leakage of UVC light from the disinfection system 10.
  • the curtain 37 is made of UV resistant thermoplastics.
  • the entry aperture 36a or exit aperture 38a is covered by a swing door 37.
  • the cassette input section 12 is located in front of the entry aperture 36a and associated curtain/door 37. Side panels 12a at the cassette input section 12 are provided so that they are spaced apart according to a function of thickness of the x-ray cassettes
  • the upper edges of the side panel 12a are, preferably, bent outward to form a Y-shaped guide for ease of inserting a cassette 11 into the input section 12.
  • the side panels 12a are substantially in line with the vertical guides 40 in the disinfection compartment 30 so that an x-ray cassette 11 is operable to move on the conveyor 20 from the input section 12, through the disinfection compartment 30 and out through the output section 14.
  • the cassette output section 14 is located outside the exit aperture 38a and associated curtain/door 37.
  • the conveyor 20 extends into the output section 14 and may comprise an overhung section 21.
  • a collection bin 60 for receiving the newly disinfected x-ray cassettes 11.
  • the input section 12 has an input cassette sensor 72 whilst the output section 14 has an output cassette sensor 74.
  • the input and output sensors 72,74 are interlocked by a timer 76 so that when cassette 11 is detected in the input section 12 or output section 14, a red indicator light 77 is turned; when no cassette 11 is inserted into the input section 12 and no cassette 11 is detected at the output section 14 after a time delay, the disinfection system 10 may turn off the UVC lamps 50 and the green indication light 77 may be turned on whilst the red indicator light 77 is turned off.
  • a fan 80 and associated filter 82 is installed on a side wall of the disinfection system 10.
  • the fan 80 and associated filter 82 is located below the conveyor 20, for example, in the service compartment 16.
  • the filter 82 is on the outside in relation to the fan 80, so that the fan 80 blows filtered air into the disinfection system 10 and provides cooling to the UVC lamps 50,50a and associated ballasts 52.
  • the fan 80 is on the inside in relation to the filter 82, so that the fan 80 sucks air from inside the disinfection system 10 and blows air to the exterior through the filter 82.
  • the filter 82 may be a high-efficiency particulate (HEPA) filter.
  • FIG. IB shows a disinfection system 10a according to another embodiment of the present invention.
  • the disinfection system 10a is similar to the earlier embodiment 10 except that the conveyor 20 does not have belt 24 but is made up of sections of rollers.
  • Each section of rollers includes a plurality of driven roller 22.
  • the driven rollers 22 are linked by transfer belts 25b and are powered by a motor 26.
  • the rollers 22 are spaced apart so that there is a gap between adjacent rollers.
  • Some of the rollers 22 have flanges at both ends for guiding travel of the x-ray cassettes 11 on the conveyor 20. In one embodiment, the flanges have step edges; in another, the flanges have inclined edges.
  • the disinfection system 10a is also different from the earlier system 10 in that there is an additional elongate UVC lamp 50b on each interior face of the two side panels 32.
  • the additional UVC lamps 50b are disposed below the rollers 22 so that during a pass of the cassette 11 on the conveyor 20, an aggregate exposure time on the bottom surface of the cassette 11 is about 1 minute.
  • the additional UVC lamps 50b have higher input and output power than the UVC lamps 50,50a disposed above the conveyor 20.
  • a reflector 28 is used to reflect the downward UVC rays back up the gaps between the rollers 22 to disinfect bottom faces of each cassette 11.
  • FIG. 2A and 2B show schematics of the electrical connections of the motor 26, fans 80 and UVC lamps 50,50b,50c.
  • FIG. 3 shows an x-ray image of a cassette exposed to 1 minute of UVC light. As shown in FIG. 3, there is no effect on the x-ray image after a cassette is exposed to UVC light.
  • FIG. 4 shows the x-ray image of a hand specimen before UVC light exposure while FIG. 5 shows the x-ray image of the hand specimen after 1 minute of exposure to UVC light.
  • Table 2 shows the results of optical density tests on the x-ray plates before and after exposure to UVC light that UVC light does not affect the x-ray cassettes and x-ray plates.
  • the disinfection system 10,10a may be modified for disinfecting x-ray cassettes for use in dental or veterinary clinics or for use with portable x-ray equipment in hospitals' accident and emergency rooms.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

Cette invention concerne un système de désinfection avec des rayons ultraviolets C (10,10a) permettant de désinfecter des coffrets de radiographies (11). Le système (10,10a) contient un compartiment de désinfection (30), un convoyeur (20) permettant de déplacer un coffret de radiographies (11) depuis l’entrée du compartiment de désinfection (30) à la sortie de celui-ci de façon à ce que les rayons ultraviolets C émis par les lampes à UVC (50,50a,50b) irradient toutes les surfaces du coffret de radiographies (11) pendant un laps de temps prédéfini et à une intensité prédéterminée pour que les bactéries, les virus et les moisissures présents sur les surfaces du coffret ne puissent pas se répliquer.
PCT/SG2008/000402 2008-10-17 2008-10-17 Désinfection de coffrets de radiographies avec des rayons ultraviolets c WO2010044748A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SG2008/000402 WO2010044748A1 (fr) 2008-10-17 2008-10-17 Désinfection de coffrets de radiographies avec des rayons ultraviolets c

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2008/000402 WO2010044748A1 (fr) 2008-10-17 2008-10-17 Désinfection de coffrets de radiographies avec des rayons ultraviolets c

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WO2010044748A1 true WO2010044748A1 (fr) 2010-04-22

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102949738A (zh) * 2012-11-24 2013-03-06 安徽华强羽绒有限公司 羽绒紫外线消毒装置
WO2013082284A1 (fr) 2011-11-29 2013-06-06 Daylight Medical, Inc. Appareil et procédé de décontamination
FR2988299A1 (fr) * 2012-03-23 2013-09-27 Claranor Dispositif de decontamination par lumiere ultra-violette et utilisation associee
WO2013173703A1 (fr) * 2012-05-18 2013-11-21 Angelini Pharma, Inc. Appareil de désinfection de dispositifs portatifs
EP2705858A1 (fr) * 2012-08-09 2014-03-12 Pol-Pack Service S.A. Tunnel de désinfection, en particulier pour la désinfection de surface d'objets
US20150082688A1 (en) * 2013-09-20 2015-03-26 Jack D. Schmitz Device for Killing Bed Bugs
CN113813412A (zh) * 2021-09-18 2021-12-21 山东第一医科大学附属省立医院(山东省立医院) 一种妇科用器具消毒及翻转储存装置
FR3111561A1 (fr) * 2020-06-17 2021-12-24 Dcast Consulting Désinfection en Continu à Haute Cadence d’Objets de Formes et Dimensions Variables
WO2022008369A1 (fr) * 2020-07-08 2022-01-13 Claranor Dispositif pour la decontamination d'objets
ES2899048A1 (es) * 2020-09-09 2022-03-09 Germibac Control S L Dispositivo para esterilizacion de maletas, contenedores o similar
CN114177322A (zh) * 2021-12-24 2022-03-15 四川省城乡建设研究院 一种生物质垃圾收集桶的风干消杀装置
CN114177323A (zh) * 2021-12-24 2022-03-15 四川省城乡建设研究院 一种生物质垃圾收集桶的风干消杀方法
FR3115461A1 (fr) * 2020-10-22 2022-04-29 Detekt'in Dispositif de désinfection de bacs empilables

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030150475A1 (en) * 2002-02-11 2003-08-14 Lorne Abrams Method and apparatus for sanitizing reusable articles
US20030170151A1 (en) * 2002-03-08 2003-09-11 Hunter Charles Eric Biohazard treatment systems
US6710357B1 (en) * 2002-06-14 2004-03-23 Uv Doctor Llc Top and bottom ultraviolet sterilization system
EP1588720A1 (fr) * 2004-04-13 2005-10-26 Hans-Joachim Dr. Huf Méthode et appareil pour tuer des pathogènes sur des organismes et objets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030150475A1 (en) * 2002-02-11 2003-08-14 Lorne Abrams Method and apparatus for sanitizing reusable articles
US20030170151A1 (en) * 2002-03-08 2003-09-11 Hunter Charles Eric Biohazard treatment systems
US6710357B1 (en) * 2002-06-14 2004-03-23 Uv Doctor Llc Top and bottom ultraviolet sterilization system
EP1588720A1 (fr) * 2004-04-13 2005-10-26 Hans-Joachim Dr. Huf Méthode et appareil pour tuer des pathogènes sur des organismes et objets

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013082284A1 (fr) 2011-11-29 2013-06-06 Daylight Medical, Inc. Appareil et procédé de décontamination
US8710460B2 (en) 2011-11-29 2014-04-29 Daylight Medical Decontamination apparatus and method
US9675721B2 (en) 2011-11-29 2017-06-13 Diversity, Inc. Decontamination apparatus and method
EP2785383A4 (fr) * 2011-11-29 2015-12-30 Daylight Medical Inc Appareil et procédé de décontamination
US9511164B2 (en) 2011-11-29 2016-12-06 Daylight Medical, Inc. Decontamination apparatus and method
FR2988299A1 (fr) * 2012-03-23 2013-09-27 Claranor Dispositif de decontamination par lumiere ultra-violette et utilisation associee
WO2013173703A1 (fr) * 2012-05-18 2013-11-21 Angelini Pharma, Inc. Appareil de désinfection de dispositifs portatifs
US9125957B2 (en) 2012-05-18 2015-09-08 Angelini Pharma, Inc. Appliance for disinfecting hand-held devices
EP2705858A1 (fr) * 2012-08-09 2014-03-12 Pol-Pack Service S.A. Tunnel de désinfection, en particulier pour la désinfection de surface d'objets
CN102949738A (zh) * 2012-11-24 2013-03-06 安徽华强羽绒有限公司 羽绒紫外线消毒装置
US9648861B2 (en) * 2013-09-20 2017-05-16 Jack D. Schmitz Device for killing bed bugs
US20150082688A1 (en) * 2013-09-20 2015-03-26 Jack D. Schmitz Device for Killing Bed Bugs
FR3111561A1 (fr) * 2020-06-17 2021-12-24 Dcast Consulting Désinfection en Continu à Haute Cadence d’Objets de Formes et Dimensions Variables
WO2022008369A1 (fr) * 2020-07-08 2022-01-13 Claranor Dispositif pour la decontamination d'objets
FR3112287A1 (fr) * 2020-07-08 2022-01-14 Claranor Dispositif pour la decontamination d’objets
ES2899048A1 (es) * 2020-09-09 2022-03-09 Germibac Control S L Dispositivo para esterilizacion de maletas, contenedores o similar
FR3115461A1 (fr) * 2020-10-22 2022-04-29 Detekt'in Dispositif de désinfection de bacs empilables
CN113813412A (zh) * 2021-09-18 2021-12-21 山东第一医科大学附属省立医院(山东省立医院) 一种妇科用器具消毒及翻转储存装置
CN114177322A (zh) * 2021-12-24 2022-03-15 四川省城乡建设研究院 一种生物质垃圾收集桶的风干消杀装置
CN114177323A (zh) * 2021-12-24 2022-03-15 四川省城乡建设研究院 一种生物质垃圾收集桶的风干消杀方法
CN114177322B (zh) * 2021-12-24 2023-07-18 四川省城乡建设研究院 一种生物质垃圾收集桶的风干消杀装置
CN114177323B (zh) * 2021-12-24 2023-07-21 四川省城乡建设研究院 一种生物质垃圾收集桶的风干消杀方法

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